
Low Cost, Low Power,
Differential ADC Driver
Data Sheet
Rev. E
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FEATURES
Fully differential
Extremely low power with power-down feature
2.6 mA quiescent supply current @ 5 V
450 A in power-down mode @ 5 V
High speed
110 MHz large signal 3 dB bandwidth @ G = 1
450 V/s slew rate
12-bit SFDR performance @ 500 kHz
Fast settling time: 100 ns to 0.02%
Low input offset voltage: ±2.6 mV max
Low input offset current: 0.45 A max
Differential input and output
Differential-to-differential or single-ended-to-differential
operation
Rail-to-rail output
Adjustable output common-mode voltage
Externally adjustable gain
Wide supply voltage range: 2.7 V to 12 V
Available in small SOIC package
Qualified for automotive applications
APPLICATIONS
ADC drivers
Automotive vision and safety systems
Automotive infotainment systems
Portable instrumentation
Battery-powered applications
Single-ended-to-differential converters
Differential active filters
Video amplifiers
Level shifters
FUNCTIONAL BLOCK DIAGRAM
04771-0-001
–IN
1
VOCM 2
VS+ 3
+OUT
4
+IN
8
PD
7
VS–
6
–OUT
5
AD8137
Figure 1.
RG = 1k
VO, dm = 0.1V p-p
FREQUENCY (MHz)
NORMALIZED
CLOSED-LOOP
GAIN
(dB)
3
2
1
0
–12
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0.1
1
10
100
1000
04771-0-002
G = 5
G = 10
G = 1
G = 2
Figure 2. Small Signal Response for Various Gains
GENERAL DESCRIPTON
Th
e AD8137 is a low cost differential driver with a rail-to-rail
output that is ideal for driving ADCs in systems that are sensitive
to power and cost. The
AD8137 is easy to apply, and its internal
common-mode feedback architecture allows its output common-
mode voltage to be controlled by the voltage applied to one pin.
The internal feedback loop also provides inherently balanced
outputs as well as suppression of even-order harmonic distortion
products. Fully differential and single-ended-to-differential gain
configurations are easily realized by th
e AD8137. External
feedback networks consisting of four resistors determine the
closed-loop gain of the amplifier. The power-down feature is
beneficial in critical low power applications.
The
AD8137 is manufactured on Analog Devices, Inc.,
proprietary second-generation XFCB process, enabling it to
achieve high levels of performance with very low power
consumption.
The
AD8137 is available in the small 8-lead SOIC package and
3 mm × 3 mm LFCSP package. It is rated to operate over the
extended industrial temperature range of 40°C to +125°C.